not bad
Good example
For EQ, xnor form uses 3 gates, but we cannot be sure about the # transistors because XNOR uses a lot of transistors
For Figure 3.21, if we count the \A as signal A with inverter, that will count as 2 additional transistors. But that is not the case. Most signals have their inverts provided as well, so we do not have to count the inverters.